The media have recently been abuzz with cases of citizens around the world using digital technologies to push for social and political change from the use of Twitter to amplify protests in Iran and Moldova to the thousands of American nonprofits creating Facebook accounts in the hopes of luring supporters. These stories have been published, discussed, extolled, and derided, but the underlying mechanics of this practice of digital activism are little understood. This new field, its dynamics, practices, misconceptions, and possible futures are presented together for the first time in Digital Activism Decoded. Topics include: how to think about digital activism: the digital activism environment: infrastructure, social, political, and economic factors: digital activism practices: two research perspectives and the danger of destructive activism: digital activism s value: balancing optimism and pessimism: building the future of digital activism.